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1999 cavalier z24 missing when hot

Sent to Car Experts November 19 2005 at 2:44 PM
   

i have a 1999 cavalier z24 an have replaced spark plugs, boots, and coil cap, an the ful pressure regulator was recently changed, all was well untill as of late it has dovelped a miss in it when it gets warm, cold it does not, but when it is missing if u let off of the gas pedal slighty it will smooth out. the harded u press on the gas the worse it gets. i changed both oxegen sensors today an still nothing. it mainly does this when under a load in a high gear. any ideas?????? thanx

Optional Information:
1999 Chevrolet cavalier z24

Customer (name blocked for privacy)
Status:  Closed   Value: $20
Answer
November 19 2005 at 2:45 PM (1 minute and 23 seconds later)
         
REPLIEDCheck Mark
Throttle position sensor. Did you change that?

Edited by johnbenn on November 19 2005 at 2:46 PM
john -- Auto, ATV, Sleds, Bikes, Tractors -- 95% Positive Feedback on 285 Car Accepts
26 years of mechanics experience
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November 19 2005 at 2:59 PM (13 minutes and 34 seconds later)
         
Reply to john's Post: no i did not change the tps.
Customer (name blocked for privacy)
Info Request
November 19 2005 at 3:10 PM (11 minutes and 20 seconds later)
         
Sounds like a fuel issue Have you checked pressure?
john -- Auto, ATV, Sleds, Bikes, Tractors -- 95% Positive Feedback on 285 Car Accepts
26 years of mechanics experience
Reply
November 19 2005 at 3:15 PM (5 minutes and 16 seconds later)
         
no i don't have a fuel pressure gauge. oh by the way that remindes me i checked the plugs today an they are very white almost no tan color, looks like it is running very lean,maybe fuel pressure regulator is gone bad, it is only 4 month old........
Customer (name blocked for privacy)
Answer
November 19 2005 at 3:17 PM (1 minute and 31 seconds later)
         
REPLIEDCheck Mark
THat could be-but may also be low pump pressure.
john -- Auto, ATV, Sleds, Bikes, Tractors -- 95% Positive Feedback on 285 Car Accepts
26 years of mechanics experience
Reply
November 19 2005 at 3:20 PM (3 minutes and 14 seconds later)
         
Reply to john's Post: so i should try a fuel filter. then get the pressure checked?
Customer (name blocked for privacy)
Answer
November 19 2005 at 3:23 PM (2 minutes and 37 seconds later)
         
ACCEPTEDCheck Mark
I would do just that.You can buy a fuel pressure guage fairly cheap and it is a great tool to have. Thanks John
john -- Auto, ATV, Sleds, Bikes, Tractors -- 95% Positive Feedback on 285 Car Accepts
26 years of mechanics experience
Reply
November 19 2005 at 3:25 PM (2 minutes and 3 seconds later)
         
thanx john
Customer (name blocked for privacy)
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